-Subway passengers in Berlin were surprised to share their carriage with a pony
-Angry rail authorities say the police have been informed of the incident

By Harriet Cooke

A pony perplexing German commuters on the subway has become the latest internet sensation.

A YouTube video of the brown Shetland pony's antics on Berlin's S-Bahn - an overground subway similar to London's Tube - has been watched nearly a quarter of a million times since it was posted on Thursday.

A mystery blonde woman, in her twenties, can be seen nonchalantly leading her horse on to the train.